基于C#实现专业级打印模板的具体方案

// NuGet安装
Install-Package FastReport
Install-Package FastReport.Export.Pdf
Install-Package FastReport.Bars

// 使用FastReport设计器创建模板
public class ReportTemplate : Report
{
    public ReportTemplate()
    {
        // 注册数据源
        this.RegisterData(new[] { new Employee() }, "Employees");
        
        // 添加页眉
        PageHeaderBand header = new PageHeaderBand();
        TextObject title = new TextObject();
        title.Text = "员工信息报表";
        title.Font = new Font("微软雅黑", 14, FontStyle.Bold);
        header.Objects.Add(title);
        this.Bands.Add(header);

        // 添加数据区域
        DataBand detail = new DataBand();
        detail.Height = 30;
        TextObject nameField = new TextObject();
        nameField.Text = "[Employees.Name]"; // 绑定数据字段
        nameField.Left = 10;
        nameField.Top = 5;
        detail.Objects.Add(nameField);
        this.Bands.Add(detail);
    }
}

public class ReportService
{
    public void GenerateReport(DataTable data)
    {
        using (Report report = new Report())
        {
            // 加载模板
            report.Load("EmployeeReport.frx");
            
            // 注册数据源
            report.RegisterData(data, "Employees");
            
            // 设置打印参数
            report.PrintSettings.ShowDialog = true;
            report.PrintSettings.Printer = "HP LaserJet";
            
            // 执行打印
            report.Prepare();
            report.Print();
        }
    }
}

// 分页标记实现
public void AddPageBreak(Report report)
{
    PageBreak pageBreak = new PageBreak();
    report.Bands[0].Objects.Add(pageBreak);
}

// 分页条件控制
detail.BeforePrint += (s, e) => 
{
    if (detail.CurrentRowIndex % 10 == 0) 
        report.AddPageBreak();
};

// 条码生成
BarcodeObject barcode = new BarcodeObject();
barcode.BarcodeType = BarcodeType.Code128;
barcode.Text = "1234567890";
barcode.Left = 100;
barcode.Top = 50;
detail.Objects.Add(barcode);

// 二维码生成
QRCodeObject qrCode = new QRCodeObject();
qrCode.Text = "https://example.com";
qrCode.Size = 100;
detail.Objects.Add(qrCode);

// 图片动态加载
ImageObject img = new ImageObject();
img.Image = Image.FromFile("logo.png");
img.Width = 80;
img.Height = 40;
detail.Objects.Add(img);

// 图片Base64嵌入
string base64 = Convert.ToBase64String(File.ReadAllBytes("logo.png"));
img.Image = Convert.FromBase64String(base64);

// 动态参数传递
report.Parameters["ReportTitle"].Value = "2023年度报告";
report.Parameters["CompanyLogo"].Value = Image.FromFile("logo.png");

// 打印质量设置
report.PrintSettings.PrintQuality = PrintQuality.High;

// 双面打印配置
report.PrintSettings.Duplex = Duplex.Vertical;

// 色彩模式控制
report.PrintSettings.Color = ColorMode.Grayscale;

public void SafePrint(Report report)
{
    try
    {
        report.Prepare();
        report.Print();
    }
    catch (PrintException ex)
    {
        Logger.LogError($"打印失败: {ex.Message}");
        ShowRetryDialog();
    }
    finally
    {
        report.Dispose();
    }
}

report.Prepare += (s, e) => 
{
    if (currentPage > 1) 
        report.LoadPageData(pageNumber);
};

private static Dictionary<string, Image> imageCache = new();

Image GetCachedImage(string path)
{
    if (!imageCache.ContainsKey(path))
        imageCache[path] = Image.FromFile(path);
    return imageCache[path];
}

public async Task PrintAsync(Report report)
{
    await Task.Run(() => 
    {
        report.Prepare();
        report.Print();
    });
}

├── PrintSystem.sln
├── src/
│   ├── Core/                // 核心打印引擎
│   ├── Templates/           // 模板文件(.frx)
│   ├── Services/            // 打印服务
│   └── Models/              // 数据模型
├── tests/
│   └── PrintService.Tests   // 单元测试
└── docs/
    └── 开发指南.md

# 模板文件存放路径
/Templates/Orders.frx
/Templates/Labels.frx

PrintService.exe --template Orders.frx --data orders.csv

[HttpPost("print")]
public IActionResult Print([FromBody] PrintRequest request)
{
    var service = new PrintService();
    service.PrintWebTemplate(request.Template, request.Data);
    return Ok();
}

// 发票模板示例
public class InvoiceTemplate : Report
{
    public InvoiceTemplate()
    {
        // 添加发票专用元素
        AddTaxCodeField();
        AddSignatureArea();
    }
}

// 条码标签生成
public void GenerateBarcodeLabel(string data)
{
    BarcodeObject barcode = new BarcodeObject();
    barcode.BarcodeType = BarcodeType.Code128;
    barcode.Text = data;
    barcode.SetSize(200, 100);
    report.Objects.Add(barcode);
}